• Geotechnical site investigation design, planning, supervision and management by direct techniques.: Shallow surveys: Hydraulic or mechanical grab samplers (Shipek, Van Veen, Box Corer); gravity samplers (basic gravity corer, piston corer, piston corer with Kullenberg device); vibrocorer samplers; seabed push-in samplers and shallow rotary drilling samplers (rock corer). Deep surveys in areas with water depths as shallow as 20 m: Rotary boreholes using conventional or wire-line drilling systems on light floating platforms, anchored barge, monopile platform, jack-up, etc. Deep surveys in areas with water depths more than 20 m: Rotary boreholes using conventional or wire-line drilling systems on vessels. Site testing: cone static penetration test (CPT) and piezocone (CPTU or PCPT) with different types of penetration systems (wheel-drive penetration test unit, light weight wheel-drive penetration test unit, Rov, minicone test, etc). Other test (autonomous or inside boreholes made): vane shear test (FVT), pressuremeter test, etc.
  • Logging, description, handling and labelling of samples and preparation of geotechnical site investigations reports.
  • Geotechnical site investigation design, planning, supervision and management by offshore geophysical survey techniques.: Bathymetry systems: echosounders, Swath echosounders and LIDAR. Seafloor morphology techniques: sub-bottom profilers (pinger), medium penetration profilers (boomer and CHIRP) and high penetration profilers (sparker). Geological survey systems: high resolution seismic refraction and electrical resistivity systems.
  • Soil or rock laboratory testing design, planning, supervisión and management.:
  • Soil. Classification tests: particle size distribution by sieving or by sedimentation; liquid and plastic limits (Atterberg limits); volumetric shrinkage limit, linear shrinkege; moisture content or water content; mass density (or unit weight); dry density (or dry unit weight); strength tests: unconfined compression test; direct shear box; triaxial compression; deformation tests: oedometer test; collapse and swelling tests: swelling and collapse on wetting test; compaction-related tests (standard or modified Proctor); pin-hole test; Pavement design tests: California bearing ratio (CBR); chemical tests: carbonate content, sulfate content, organic matter content, chloride content, pH; chemical analysis of ground water.
  • Rocks. Classification tests: moisture content, porosity, bulk density, water absorption. Strength tests: uniaxial compression, point load test or Franklin test, direct tensión test, indirect tensile strength test or Brazilian test, strength tests in discontinuities in direct shear box, triaxial compression; Deformation tests: determination of dynamic deformation modulus (Young modulus, poisson ratio). Durability tests: swelling, crumbling, moisture-dryness cycles, heating-cooling cycles; freeze-thaw cycles; salt crystallization cycles, immersion tests (Dusseault, Lutton), Slake-durability index test, speed of sound, primary or push-pull waves measurement in rock cores. Thin section petrographical analysis. X-ray difraction. Test for determining rock hardness and abrasiveness: Cerchar, sclerometer or Schmidt hammer, Schimazek abrasiveness index determination.